Dry ore-concentrator.



PATENTED MAR s. 1908.

J. HUBERT. DRY ORE GONOE'NTRATOR.

APPLICATION FILED MAR. 4. 1907.

3 SHEETS-SHEET l.

w/r/vfssm I 6. W aa INVENTOR JOSEPH HUBERT By M ATTORNEYS m2 NORRIS PETERS co., WASHlNGTL7N,-D. 1:,

PATENTED MAR. 3, 1908.

J. HUBBRT. DRY ORE GONOENTRATOB.

APPLICATION FILED MAR 4. 1907.

3 SHEETS-SHEET 2.

uwavm/a JOSEPH HUBERT W/T/VESSES v ATTORNEYS 1H: NORRIS PETERS C04, wnsmucrou, o c.

.No. 880,995. PATENTED MAR 3, 1908.

J. HUBBRT.

DRY ORE GONOENTRATOR.

APPLICATION FILED MAR-.4. 1907.

3 SHEETS-SHEET 3.

W/TNESSES 'HVVENTOH a? jy a I JEIBEP HuaERT m: Normgs ps-rzns c 0,, WASHINGTON, D- c.

JOSEPH HUBERT, OF RENO, NEVADA.

DRY ORE-CONCENTRATOR.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed March 4, 1907. Serial No. 360,508.

To all whom it may concern:

Be it known that I, J osnrn HUBERT, a citizen of the United States, residing at Reno, in the county ofVVashoe and State of Nevada, have invented a new and useful Improvement in Dry Ore-Concentrators, of which the following is a specification.

This invention relates to dry ore concentrating machines in which the gravel or minerals are separated without the use of water.

The object of the invention is to provide an improved machine to separate the gold from dry gravel or tailings by means of a table having thereon riffles adapted to catch the heavier and finer particles, or values, as the gravel travels over the table, which is swung u and down vertically and oscillated latera y, as well as given a shaking or jarring motion, by means to be hereinafter described.

In the accompanying drawings, wherein an embodiment of the invention is illustrated,Figure 1 is a front elevation of the machine. Fig. 2 is a side elevation. Fig. 3 is a rear elevation. Fig. 4 is a detail in section of the table. Fig. 5 is a detail of a grooved bar or shaft which supports the front end of the table. Fig. 6 is a side view of a crank disk of variable throw, for producing the side swing or oscillation of the table.

The frame of the machine is indicated as a whole at X, being made of timbers of suitable size and shape to support the parts hereinafter described.

The concentrating table A is hung or supported within this frame, the front or lower end being secured to and supported by a round cross bar or shaft B which rests at its ends upon wheels I) set in recesses in the front posts of the frame. The bar has longitudinal movement on these wheels, as the table is swung laterally, and also turns thereon, as the rear end of the table is raised and lowered. Said rear end is en ported by or connected to the upper enc s of substantially vertical pitmen e which are connected to cranks E of a cross shaft E journaled in the rear posts of the frame. Two pitmen and cranks are used, one near each side of the table. As the shaft is turned the rear or upper end of the table is raised or lowered, and the pitman connections are loose, in order to allow the lateral swing referred to. The rear end of the table is also supported or partly balanced by weights m connected to the table and by cables M which pass over wheels N at the top of the rear posts of the frame. These serve as counterweights and prevent irregular or jerky motion.

The ends of the bar B are provided with a series of circumferential grooves B forming racks or corrugated portions which as they travel along the wheels I), give a succession of jars or vibrations to the table which is very effective in the stratification or separation of the ore.

The drive shaft G is shown provided with a hand crank L and fly wheel O. It carries a pinion g which meshes with a large gear F on the crank shaft E, thereby giving a comparatively slow up and down motion to the rear end of the table, which, as said before, swings Vertically on bar B as a pivot. The drive shaft also has a bevel gear H in mesh with bevel gear h on side shaft I which has a crank disk J connected by pitman 7' to fixture K under the bottom of the table, at the middle thereof. The throw of the crank disk may be varied to suit the kind of gravel being worked, by placing the wrist pin in any one of the holes J in the disk (see Fig. 6).

In operation, the gravel is fed onto the table A at the upper or rear end thereof. Turning the crank L causes the table to swing up and down, and also laterally, the former motion being comparatively slow and the latter quite rapid. At the same time the lateral or side swing causes the grooved bar B to travel over the rollers 12, producing a rapid succession of jars or vibrations, the combined motions and vibrations serving to shake the coarse gravel off the tail of the table at the front and to separate the heavier particles which are caught in the riffles c of the table. These riflies are conveniently constructed of iron in the form of bars extending across the table and undercut on the upper face, as shown in Fig. 4.

I claim 1. The combination-with a concentrating table, of means to impart vertical and lateral motion thereto, comprising a driveshaft having a pinion and a bevel gear thereon, a crank shaft having a gear meshing with the pinion and having pitmen working vertically and connected between the table and the cranks, a side shaft having a bevel gear meshing with said bevel gear, and a crank disk thereon, and a pitman connected between said disk and the table.

2. The combination with a concentrating table, of means for imparting vertical and lateral motion thereto, comprising a drive shaft having a pinion, a crank shaft having a gear meshing With the pinion and provided with pitrnen Working vertically and connecting the table and the cranks, a side shaft provided with a crank disk, 2. pitman connecting the crank disk and the table, and

a driving connection between the side shaft and the driving shaft.

JOSEPH HUBERT VVitries'ses:

EDWARD C. TRAvERs, GEORGE HARD. 

